show that (x^2+1)^2=0 has no real roots
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(x^2+1)^2=0
or,(x^2+1)(x^+1)=0
then,(x^2+1)=0 [0×something=0]
or,0 to the power anything=0
so,(x^2+1)^2=0 & it has no real roots!
or,(x^2+1)(x^+1)=0
then,(x^2+1)=0 [0×something=0]
or,0 to the power anything=0
so,(x^2+1)^2=0 & it has no real roots!
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